body,input,div,button {
	padding: 0 0 0 0;
	margin: 0 0 0 0;
}
html {
	height: 100%;
}
body {
	min-height: 100%;
	height: 100%;
}
#calculator {
	position: relative;
	width: 25%;
	height: 60%;
	margin: auto;
	top: 20%;
	
}
button {
	width: 20%;
	height: 80%;
	margin-left: 2.5%;
	margin-right: 2.5%;
	overflow: hidden;
	text-overflow: ellipsis;
	font-size: 1em;
}
button:hover {
	background: #27AE60;
}
button:active {
	background: #E67E22;
}
.func {
	background: #7F8C8D;
	font-weight: bolder;
}
.show,.showRes {
	position: relative;
	width: 94%;
	height: 40%;
	margin-left: 2.5%;
	margin-right: 2.5%;
}
.showRes {
	border-top: 0;
}
.show {
	border-bottom: 0;
}

.buttonGroup {
	position: relative;
	width: 100%;
	height: 16%;
}